Summon: Draw each unit that died this turn. They get Flying and become Valkyrie.
Card sounds may differ from in-game as they get updated.
Flying - Flying units can only be blocked by other flying units, but can block ground units normally. They can also be directly attacked by Killer units and Relic Weapons.
Summon - Does something when played
Steal - Taking an enemy card is stealing. Stealing a card removes its influence requirements.